From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Clifton Subject: Re: HP nc6400 v.03 or v.05 laptop ACPI fails after reboot, works again after booting windows Date: Thu, 21 Dec 2006 22:40:51 +0000 Message-ID: <1166740851.5576.5.camel@pcjc2lap> References: <457F37C0.3090003@gmail.com> <1165966936.29844.37.camel@pcjc2lap> <457FB1A1.2030602@gmail.com> <1166012707.22903.4.camel@pcjc2lap> <4582A607.8040302@gmail.com> <1166191807.7459.16.camel@pcjc2lap> <45832339.3050307@gmail.com> <20061216043002.GA29560@tangens.sinus.cz> <4583A779.3000902@gmail.com> <20061216081757.GA3571@invalid.invalid> <458B0027.2000909@gmail.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from ppsw-7.csi.cam.ac.uk ([131.111.8.137]:41196 "EHLO ppsw-7.csi.cam.ac.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1423089AbWLUWlE (ORCPT ); Thu, 21 Dec 2006 17:41:04 -0500 In-Reply-To: <458B0027.2000909@gmail.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Lincoln Baxter, III" Cc: linux-acpi@vger.kernel.org On Thu, 2006-12-21 at 16:44 -0500, Lincoln Baxter, III wrote: [snip] > Can someone point me to the code that determines the voltage / amperage > pairings for CPUs in power saving mode? Is this handled by the ACPI bios > (bios function call), or does the kernel directly affect the power setting? > > I'd like to take a look and see what's going on. I can't recall where in the code this is, but it is the bios which provides the voltage/frequency pairings. The speed-step drivers for older processors actually have them hard-coded as a table. If you're not seeing the highest frequency - I don't know what the problem is. Mine re-appeared after the rmmod psmouse trick I posted earlier. The CPU specs are in a separate SSDT on my laptop, which only shows up when the appropriate bios setting for speedstep is ticked, and the bios is "happy" (psmouse removed before shutdown). Peter C.